(19)
(11) EP 0 437 253 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.03.1992 Bulletin 1992/11

(43) Date of publication A2:
17.07.1991 Bulletin 1991/29

(21) Application number: 91100239.2

(22) Date of filing: 09.01.1991
(51) International Patent Classification (IPC)5: B01L 3/02, G01N 1/28
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 10.01.1990 US 463283

(71) Applicant: Gilson, Warren E.
Madison, Wisconsin 53705 (US)

(72) Inventor:
  • Gilson, Warren E.
    Madison, Wisconsin 53705 (US)

(74) Representative: Bauer, Robert, Dipl.-Ing. et al
Patentanwälte Boeters & Bauer Bereiteranger 15
81541 München
81541 München (DE)


(56) References cited: : 
   
       


    (54) Continuously adjustable diluting device for mixing predetermined volumes of liquid


    (57) A continuously adjustable liquid mixing device (10) for intermixing selectively adjustable volumes of several liquids comprises a body (12) for holding a plurality of volumes of said liquids including a recess (14) at an upper end. A mechanism is provided for drawing up the volumes of liquid into the body and thereafter expelling the same from a lower end. A volume adjusting selecting mechanism (22) is provided for at least one of the volumes including a rotary element (26) mounted in the recess and frictionally engaging (28) a wall surface (14a) thereof for retaining a selected volume that is desired. A rotary drive system (34) is provided for rotating the volume adjustment mechanism (22) and is readily accessible externally of the body for convenient manipulation to select a desired volume. The drive system (34,36) is movable between an outer operating position for easy manipulation and a retracted position when not in use.






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